import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/Users.vue'
import Rights from '../components/power/Rights'
import Roles from '../components/power/Roles'
import Cate from '../components/goods/Cate'

Vue.use(VueRouter)

const routes = [
  {
    path: '/',
    redirect: '/login'
  },
  {
    path: '/login',
    name: 'Login',
    component: Login
  },
  {
    path: '/home',
    name: 'home',
    component: Home,
    redirect: 'Welcome',
    children: [
      { path: '/welcome', name: 'Welcome', component: Welcome},
      { path: '/users', name: 'users', component: Users},
      { path: '/rights', name: 'rights', component: Rights},
      { path: '/roles', name: 'roles', component: Roles},
      { path: '/categories', name: 'cate', component: Cate},
    ]
  }
]

const router = new VueRouter({
  routes
})

// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
  // to 将要访问的路径
  // form 代表从哪个路径跳转而来
  // next 是一个函数, 表示放行
  // next() 放行; next('/login') 表示强制跳转

  if (to.path === '/login') return next();

  // 获取token
  let token = window.sessionStorage.getItem('token');
  if (!token) return next('/login');
  next()
})

export default router
